Honeycomb-like hydrogel, moisture power generation device and application

Abstract

The invention belongs to the technical field of novel green energy, and particularly discloses honeycomb-like hydrogel, a moisture power generation device and application of the honeycomb-like hydrogel. The honeycomb-like hydrogel is prepared by introducing sodium dodecyl benzene sulfonate and lithium acetate into an acrylamide monomer and carrying out high-temperature cross-linking gel forming; the moisture power generation device sequentially comprises a bottom electrode, honeycomb-like hydrogel and a top electrode from bottom to top. The honeycomb hydrogel can absorb moisture in the environment and carry out ion transmission in the power generation process through interaction between hydrophilic groups and water molecules, so that phase change energy of the water molecules is absorbed to generate electric energy. The moisture generator has high flexibility and high current density output. The complete honeycomb-like hydrogel can be repeatedly bent to a great extent without being damaged, repeated bending at different angles shows excellent mechanical strength, electric energy can be generated at multiple bending angles, and the honeycomb-like hydrogel has the advantages of being free of pollution, clean, sustainable, almost unlimited in power generation condition and the like.

Description

Technical Field

[0001] The invention belongs to the technical field of novel green energy, and in particular relates to a honeycomb-like hydrogel, a wet gas power generation device and applications. Background Art

[0002] At present, energy crisis and climate warming are becoming increasingly serious and have become important factors hindering the high-quality development of the global economy and ecological civilization. The development of new green energy technologies is of great significance to promoting the green and low-carbon transformation of the energy system and achieving global carbon neutrality as soon as possible. In recent years, the emerging hydrovoltaic effect can directly convert water energy into electrical energy, which is a promising green power generation technology. The hygroelectric generator (HEG) in the hydrovoltaic field is an energy collection and conversion device that uses environmental moisture to generate electricity. Since environmental moisture is everywhere, HEG is almost completely independent of the working environment and can generate electricity anytime and anywhere. It has huge development space and has become a research hotspot in the field of new green energy technology. However, in the related technologies, the hygroscopic materials used in most research works are relatively expensive, and other technical issues such as complex preparation process, low output current density, and low output power have not been solved, which limits the cost and application scenarios of the device. Therefore, it is of breakthrough significance to study and develop a hygroelectric generator that can effectively overcome the above-mentioned conditions.

[0003] In related studies, people have used HEG prepared from graphene oxide films and graphene derivatives to generate intermittent electricity. Later, researchers used HEG constructed from hydrophilic polymer films and biomass films to achieve continuous power generation, but the output current and power density are still severely limited by poor water collection ability and sluggish ion dynamics. At present, the current density of most HEGs is less than 10μA cm -2 and power density below 10 μW cm -2, there is still a long way to go before it can be put into practical application, and some HEGs still need to rely on rectifier circuits to drive small electronic devices, which may lead to additional energy losses and complex circuit designs. Secondly, among the wide range of wet electrical materials, the application of semiconductor and graphene-based HEGs in wearable devices is limited by their inherent rigid structures. In addition, HEGs not only require continuous energy collection and conversion processes, but also require advantages such as environmentally friendly and harmless electricity-generating materials and simple preparation processes. However, most of the previously reported work focuses on output performance, but the materials used are expensive, the processes are complex and energy-consuming (such as electrospun nanofibers, graphene and protein nanowires, etc.). Therefore, the development of a high-power output HEG that can directly drive wearable electronic devices using flexible green materials with simple processes and low costs is a technical problem that needs to be solved urgently. Although it is challenging, it is of great significance to achieve zero pollution, zero carbon emissions and sustainable energy alternatives.

[0004] Therefore, the development of a flexible and sustainable wet gas power generation device and related technologies with more accessible, environmentally friendly, abundant and low-cost materials, simple preparation methods and high current density output is of great significance for the development and utilization of new green energy. Summary of the invention

[0005] The purpose of the present invention is to overcome the defects of the prior art and provide a honeycomb-like hydrogel, a moisture power generation device and applications.

[0006] As a three-dimensional network structure material formed by cross-linking of hydrophilic polymers, hydrogel has unique properties and advantages. First, hydrogel contains a large number of oxygen-containing hydrophilic groups, has good hygroscopicity, and can absorb water several times more than its own weight; second, the unique three-dimensional network structure of hydrogel provides a large number of pores, which can provide an ideal matrix for the embedding and fixation of different functional materials, and has bionic design; finally, hydrogel has good flexibility and elasticity, and can adapt to the working requirements of various complex environments. Therefore, hydrogel has strong hygroscopicity, ionization performance and environmental applicability.

[0007] In order to achieve the above purpose, one of the technical solutions of the present invention is: a method for preparing a honeycomb-like hydrogel, comprising the following steps: mixing sodium dodecylbenzene sulfonate, lithium acetate, a neutral monomer and water in a mass ratio of 2-4:0.5-1.5:7-11:0.5-1.5 to obtain a mixed solution, adding a cross-linking agent N,N'-methylenebisacrylamide and a catalyst ammonium persulfate, deoxygenating after stirring, and then centrifuging to remove bubbles to obtain a honeycomb hydrogel solution, and finally cross-linking the honeycomb hydrogel solution at high temperature to obtain a honeycomb-like hydrogel.

[0008] The honeycomb-like hydrogel obtained above was stored in a clean culture dish, and a proper amount of deionized water was dropped into it for moisture retention.

[0009] In a preferred embodiment of the present invention, the neutral monomer is at least one of acrylamide, hydroxyalkyl methacrylate, 2,4-pentadienol-1, an acrylate derivative, and N-vinyl pyrrolidone.

[0010] In a preferred embodiment of the present invention, the mass ratio of the mixed solution, the cross-linking agent and the catalyst is 1500-2500:0.5-1.5:1.5-2.5.

[0011] In a preferred embodiment of the present invention, the thickness of the honeycomb-like hydrogel is 0.5-5 mm. Those skilled in the art can reasonably adjust the thickness of the honeycomb-like hydrogel according to actual use requirements to obtain corresponding power generation efficiency.

[0012] In a preferred embodiment of the present invention, the stirring temperature is 20-40°C, the time is 20-40 min, the bubbling time is 5-15 min, the centrifugal speed is 350-550 rpm, the high temperature cross-linking temperature is 70-90°C, and the high temperature cross-linking time is 10-30 min.

[0013] The honeycomb-like hydrogel in the present invention is prepared by introducing neutral monomers such as sodium dodecylbenzene sulfonate and lithium acetate, adding a crosslinking agent N,N'-methylenebisacrylamide and a catalyst ammonium persulfate, and crosslinking to form a gel at high temperature. On the one hand, it not only has a strong 3D network structure, which improves mechanical properties and proton dissociation efficiency, but also has a high porosity of the constructed bionic honeycomb structure, which not only improves the contact area, but also creates a good environment for a persistent moisture gradient, and enhances continuous power generation by efficiently absorbing, transmitting and evaporating moisture, thereby giving it a strong water absorption and ionization capacity. On the other hand, Li in the honeycomb-like hydrogel + The induced Hofmeister effect opens up the tight bonding network in the hydrogel in the polymer chain, expands the spacing between the polymer chains, and establishes a highway for convenient ion migration, thereby achieving rapid ion transmission. Therefore, the honeycomb hydrogel in the present invention can absorb moisture in the environment and transmit ions in the power generation process through the interaction between the hydrophilic groups and water molecules, thereby absorbing the energy of the phase change of water molecules to generate electricity.

[0014] In order to achieve the above purpose, the second technical solution of the present invention is: a honeycomb-like hydrogel prepared by the above preparation method.

[0015] In order to achieve the above objectives, the third technical solution of the present invention is: a wet gas power generation device, comprising the above-mentioned honeycomb-like hydrogel.

[0016] In a preferred embodiment of the present invention, the wet gas power generation device comprises a bottom electrode, a honeycomb-like hydrogel and a top electrode from bottom to top, the upper surface of the honeycomb-like hydrogel is bonded to the top electrode, and the lower surface is bonded to the bottom electrode.

[0017] Further preferably, the top electrode has a porous structure, which is conducive to promoting the adsorption-desorption of gaseous water on the surface of the hydrogel and the transfer ability of the top layer of the membrane to the top electrode, thereby improving the current output performance of wet gas power generation.

[0018] More preferably, the mesh size of the porous structure is 10-400 meshes.

[0019] The mesh number described in the present invention is based on the Chinese standard, that is, the aperture of 10 mesh is 2.00 mm.

[0020] The term "mesh number" in the present invention refers to the number of mesh holes in an area of ​​1 square inch (25.4 mm×25.4 mm). Those skilled in the art can reasonably adjust the mesh number according to actual usage.

[0021] Further preferably, the material of the top electrode includes but is not limited to titanium, copper, gold, silver and platinum.

[0022] Further preferably, the material of the bottom electrode includes but is not limited to indium tin oxide, titanium, copper, gold, silver and platinum.

[0023] In a preferred embodiment of the present invention, the wet gas power generation device is suitable for air with a relative humidity of 20-100%.

[0024] The above-mentioned wet gas power generation device can generate electricity by being placed in a common environment, and the wet gas power generation device in the present invention needs to continuously absorb moisture at a certain humidity in order to continuously generate electricity.

[0025] In order to achieve the above objectives, the fourth technical solution of the present invention is: a method for preparing a wet gas power generation device, comprising the following steps: preparing a honeycomb hydrogel on the surface of a bottom electrode, and covering a top electrode on the other side of the honeycomb hydrogel, thereby obtaining a honeycomb hydrogel wet gas power generation device with a high current density output.

[0026] The wet gas power generation device in the present invention overcomes the defects of the existing power generation device, can convert the phase change energy from gas phase water to liquid phase water into electrical energy for collection, and has the advantages of simple manufacturing process, low cost, pollution-free, sustainable, and environmentally friendly. Moreover, compared with the latest biological nanowire wet gas power generation device in the prior art, the present invention mainly utilizes the hydrophilic functional groups contained in the honeycomb hydrogel to realize the separation of charged ions in water, and promotes the exchange of water molecules at the interface between the membrane and the air through the top electrode of the porous structure, that is, absorbs water from the air, and the water molecules form a humidity gradient difference in the vertical direction inside the hydrogel. As the water vapor continues to diffuse from the upper part, a large number of hydrophilic groups in the hydrogel adsorb water molecules, which can decompose the hydrophilic groups in the membrane into hydrogen and oxygen ions, causing the charge to accumulate near the top. The charge difference between the top and bottom of the hydrogel causes ion flow, thereby generating an ion concentration gradient between the two electrodes, and then generating a potential difference, promoting the flow of electrons, thereby improving the wet gas power generation performance of the device, with lower cost and a simpler and faster preparation method.

[0027] The moisture generator in the present invention has high flexibility and high current density output. The complete honeycomb hydrogel can be bent repeatedly to a large extent without being damaged. Repeated bending at different angles shows its excellent mechanical strength and can generate electricity at multiple bending angles. A single honeycomb hydrogel moisture generator can output up to 328μAcm in an environment with a relative humidity of 60%. -2 The short-circuit current density is more than 10 times that of most previously reported wet gas generators. That is, since the sulfonic acid group is a strong acid group with strong ionization ability, the sulfonic acid group and the hydrophilic functional group will be effectively dissociated during the absorption of water molecules, releasing a large number of negatively charged groups and positively charged H + , protons are released, reducing the chemical potential of water. At the same time, during the water adsorption process, Li + The induced Hofmeister effect destroys the hydrogen bond connection between water and polymer chains, expands the ion transport channels between polymer chains, and forms a new four-hydrogen bond transport network, thereby improving ionic conductivity and facilitating the transport of hydrated ions and H + The rapid directional migration of ions leads to a higher current density output. In addition, in the spontaneous adsorption process, the synergistic effect of ion diffusion supplemented by the hydration energy of hydrated ions can convert sensible heat into latent heat, and heat energy can be extracted from the surrounding environment. The change in chemical potential energy can be further converted into electrical energy, thereby achieving long-term and stable electrical energy output.

[0028] The wet gas power generation device of the present invention has continuous voltage and current output and can maintain a stable state for a long time. 2When exposed to the air, the wet gas generator can continuously generate an open circuit voltage of 0-0.75 volts and a load current of 0-5 microamperes (the external load resistance is 1 megohm). It can be used as a power source to power light bulbs, electronic displays and other electrical appliances through series or parallel connection. Of course, as the core component of the wet gas power generation device, the simulated honeycomb hydrogel naturally has the same efficiency.

[0029] Compared with the prior art, the present invention has the following beneficial effects:

[0030] 1. The present invention provides a honeycomb-like hydrogel, the preparation method of which is simple and quick, and can be used as a core component of a wet gas power generation device to construct a wet gas power generation device. Compared with the core components of the existing wet gas power generation device, the preparation process of the honeycomb-like hydrogel in the present invention is simpler, the cost is lower, and the power generation efficiency is higher;

[0031] 2. The present invention provides a honeycomb hydrogel-like wet gas generator that is simple to prepare, green and environmentally friendly, generates electricity continuously and stably, and has a high current density output. The wet gas generator can use the moisture in the environment to generate electricity continuously, has the characteristics of being pollution-free, sustainable and stable, environmentally friendly, and the power generation conditions are almost not restricted by day and night. It continuously generates an open circuit voltage of 0-0.75 volts and a load current of 0-5 microamperes (the external load resistance is 1 megohm), and a single honeycomb hydrogel-like wet gas generator can output up to 328 μA cm in an environment with a relative humidity of 60%. -2 The short-circuit current density is more than 10 times that of most previously reported wet gas generators. The honeycomb-like hydrogel wet gas generator can be used to power commercial electronic devices or daily power generation equipment, with high economic, environmental and social benefits. It is of great significance to the development of global carbon neutrality and green energy technology, and also has technical potential for practical application. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 is a schematic structural diagram of the honeycomb-like hydrogel moisture generator in Example 2 of the present invention;

[0033] Figure 2 is a scanning electron microscope image of the honeycomb-like hydrogel surface of the honeycomb-like hydrogel gas generator in Example 2 of the present invention;

[0034] Figure 3 are the open circuit voltage and short circuit current of the honeycomb-like hydrogel moisture generator in Example 2 of the present invention and the acrylamide hydrogel moisture generator in Comparative Example 1 at a relative humidity of 60%, wherein (a) is the open circuit voltage and short circuit current of the honeycomb-like hydrogel moisture generator in Example 2 at a relative humidity of 60%, and (b) is the open circuit voltage and short circuit current of the acrylamide hydrogel moisture generator in Comparative Example 1 at a relative humidity of 60%;

[0035] Figure 4 is the load current of the honeycomb-like hydrogel moisture generator in Example 2 of the present invention when it is connected to a 1 megohm load resistor at a relative humidity of 60%;

[0036] Figure 5 is the open circuit voltage of the honeycomb-like hydrogel moisture generator in Example 2 of the present invention at 20%, 60% and 90% relative humidity;

[0037] Figure 6 This is the state of the honeycomb-like hydrogel moisture generator in Example 2 of the present invention;

[0038] Figure 7 is the open circuit voltage of the honeycomb-like hydrogel moisture generator in Example 2 of the present invention in a bent state;

[0039] Figure 8 It is the current density of the honeycomb-like hydrogel moisture generator in Example 2 of the present invention at a relative humidity of 60%. DETAILED DESCRIPTION

[0040] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is described in more detail below with reference to the accompanying drawings and specific embodiments, but the protection scope of the present invention is not limited to these embodiments.

[0041] Unless otherwise specified, the experimental materials and reagents used are consumables and reagents that can be obtained from conventional commercial channels.

[0042] The sources of the raw materials used in the following examples are shown in Table 1.

[0043] Table 1 Sources of raw materials used in the examples of the present invention

[0044]

[0045] The hydrophilic functional groups in the honeycomb hydrogel will be ionized after absorbing water. The ionized mobile charged ions will move in a directional manner as the surface of the honeycomb hydrogel is affected by the humidity difference, thereby forming an electric field. At this time, it can continuously output electrical energy by connecting it to an external circuit. That is, this continuous output of electrical energy is mainly generated by the continuous moisture exchange on the surface of the honeycomb hydrogel. Based on this, a honeycomb hydrogel moisture power generation device is constructed.

[0046] Example 1

[0047] A honeycomb-like hydrogel is prepared by the following method:

[0048] Sodium dodecylbenzene sulfonate, lithium acetate, acrylamide, and water were mixed in a mass ratio of 3:1:9.1:0.9 to obtain 10.5 g of a mixed solution, and then 0.005 g of a cross-linking agent N,N'-methylenebisacrylamide and 0.01 g of a catalyst ammonium persulfate were added and stirred at room temperature of 24°C for 30 minutes, and then transferred to a deoxygenation bottle, and N2 was bubbled for 10 minutes for deoxygenation, and then centrifuged at a low speed of 450 rpm to defoam to obtain a homogeneous honeycomb hydrogel solution, and finally the honeycomb hydrogel solution was poured into a mold with a designed shape, and placed in an oven at 80°C for cross-linking for 20 minutes to obtain a honeycomb-like hydrogel. After cross-linking is completed, it is taken out from the mold to obtain a honeycomb-like hydrogel with a thickness of 3 mm.

[0049] The mold in this embodiment is a hollow mold constructed with conductive glass as the bottom (the area of ​​the hollow part is 0.4×0.4 cm and the depth is 0.5 cm).

[0050] The honeycomb-like hydrogel prepared in this example was observed by scanning electron microscopy. Figure 2 , and found that its surface is honeycomb-like with rich pore structure.

[0051] Example 2

[0052] A honeycomb hydrogel moisture power generation device, such as Figure 1 As shown, from top to bottom, it includes a porous top electrode, a simulated honeycomb hydrogel and a bottom electrode. The simulated honeycomb hydrogel is placed on top of the bottom electrode and fits with the bottom electrode, and the porous top electrode covers the simulated honeycomb hydrogel, thereby forming a sandwich structure device.

[0053] When the honeycomb hydrogel moisture power generation device in the embodiment of the present invention is placed in the air, the water (humidity) in the air passes through the porous electrode and contacts the honeycomb hydrogel, and the water molecules enter the semi-dried honeycomb hydrogel, inducing the charge separation of the hydrophilic functional groups and sulfonic acid groups of the honeycomb hydrogel, releasing freely movable charged ions, and the charged ions diffuse from the contact surface of the honeycomb hydrogel and the porous top electrode (high water molecule concentration area) to the contact surface of the honeycomb hydrogel and the bottom electrode (low water molecule concentration area), forming a stable electric field. After the porous top electrode and the bottom electrode are connected to the external circuit, this electric field can continuously output electrical energy under the action of air moisture. Selecting a porous top electrode close to the bottom electrode area to construct a honeycomb hydrogel moisture power generation device can be more conducive to collecting electrons on the top of the honeycomb hydrogel, thereby increasing the current density of power generation.

[0054] The honeycomb-like hydrogel moisture power generation device is prepared by the following method:

[0055] The honeycomb-like hydrogel obtained in Example 1 was placed on the bottom electrode of Glass-ITO, and then a titanium mesh porous top electrode (pore size of 150 mesh) slightly smaller than the bottom electrode area was placed on the honeycomb-like hydrogel to obtain a honeycomb-like hydrogel moisture power generation device.

[0056] By observing the cross section of the constructed honeycomb hydrogel moisture power generation device, Figure 2 As shown, the honeycomb-like hydrogel was found to be in close contact with the bottom electrode.

[0057] The porous top electrode and bottom electrode of the honeycomb-like hydrogel moisture power generation device obtained in this example are connected to an electrochemical workstation to form a closed loop circuit, and the electrical signal generated is monitored in real time. It was found that after the honeycomb-like hydrogel absorbed moisture in the air with a relative humidity of 60%, the hydrophilic functional groups on the surface of the hydrogel were ionized to form mobile charged ions. The charged ions moved in a directional manner with the humidity on both sides of the hydrogel to form a potential difference, so that the honeycomb-like hydrogel moisture power generation device can generate a stable open circuit voltage. It has been measured that the open circuit voltage generated by the honeycomb-like hydrogel moisture power generation device constructed in Example 1 is basically maintained at 0.63 volts. Figure 3 After connecting a 1 megohm external resistor, it was found that the honeycomb hydrogel moisture power generation device constructed in Example 1 can continuously output a load current of 4.8 microamperes. Figure 4 As shown. The relative humidity of the environment was adjusted, and the honeycomb hydrogel moisture power generation device constructed in Example 2 was placed in an environment with a relative humidity of 20%, and it was found that it could generate an open circuit voltage of 0.17 volts. The device was placed in an environment with a relative humidity of 90%, and it was found that it could generate an open circuit voltage of 0.75 volts, as shown. Figure 5 As shown. This shows that the device has good wet power generation performance under the condition of 20%-95% air humidity, especially the wet power generation performance is better under the humidity above 60%, and has a wide range of applications.

[0058] The bottom electrode with the honeycomb hydrogel attached in the honeycomb hydrogel moisture power generation device obtained in this embodiment was repeatedly folded and bent, and it was found that it was not damaged, which can be used to illustrate that the honeycomb hydrogel has high-strength flexibility. The honeycomb hydrogel moisture power generation device was then bent to 90° and placed in an environment with a relative humidity of 60%, and the porous top electrode and bottom electrode of the honeycomb hydrogel moisture power generation device were connected to an electrochemical workstation to form a closed loop, and the electrical signal generated was monitored in real time. It was found that it can generate an open circuit voltage of 0.60 volts in the bent state, which shows that the device has good flexibility and can be used as a flexible power supply device.

[0059] The honeycomb hydrogel moisture power generation device obtained in this example was placed in a humidity control box with a relative humidity of 60% and its current density output was tested for 5000 seconds. It was found that it could output up to 328 μA cm -2 The short-circuit current density is more than 10 times that of most previously reported wet gas generators, and has good stability, such as Figure 8 shown.

[0060] Comparative Example 1

[0061] A wet gas power generation device, the preparation method is the same as that of Example 2, except that acrylamide hydrogel is used instead of the honeycomb-like hydrogel. The preparation method of acrylamide hydrogel is as follows:

[0062] Acrylamide and water were mixed at a mass ratio of 1:10 to obtain 10.5 g of a mixed solution, and then 0.005 g of N, N'-methylenebisacrylamide (cross-linking agent) and 0.01 g of ammonium persulfate (catalyst) were added and stirred at room temperature of 24°C for 10 minutes, and then transferred to a deoxygenation bottle, and N2 was bubbled for 10 minutes for deoxygenation, and then centrifuged at a low speed of 450 rpm to defoam to obtain a homogeneous acrylamide solution, and finally the acrylamide solution was poured into a mold with a designed shape, and placed in an oven at 80°C for cross-linking for 20 minutes to obtain an acrylamide hydrogel. After cross-linking is completed, it was taken out from the mold to obtain an acrylamide hydrogel with a thickness of 3 mm.

[0063] The porous top electrode and bottom electrode of the acrylamide hydrogel moisture power generation device obtained in this comparative example were connected to an electrochemical workstation to form a closed loop circuit, and the electrical signal generated was monitored in real time. The open circuit voltage and short circuit current of the acrylamide hydrogel moisture power generator at a relative humidity of 60% are shown in Figure 2. Figure 3 As shown in (b), it can produce an open circuit voltage of 0.063 V and a short circuit current of 0.48 μA.

[0064] from Figure 3 (a) and Figure 3 From the measurement results of (b), it can be seen that the power output of the honeycomb hydrogel moisture power generation device is much higher than that of the acrylamide hydrogel moisture power generation device.

[0065] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some or all of the technical features thereof may be replaced by equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A method for preparing a honeycomb-like hydrogel, characterized in that: The method comprises the following steps: mixing sodium dodecylbenzene sulfonate, lithium acetate, a neutral monomer and water in a mass ratio of 2-4:0.5-1.5:7-11:0.5-1.5 to obtain a mixed solution, adding a cross-linking agent N,N'-methylenebisacrylamide and a catalyst ammonium persulfate, stirring and deoxygenating, and then centrifuging and removing bubbles to obtain a honeycomb hydrogel solution, and finally cross-linking the honeycomb hydrogel solution at high temperature to obtain an imitation honeycomb hydrogel.

2. The method for preparing the honeycomb-like hydrogel according to claim 1, characterized in that: The neutral monomer is at least one of acrylamide, hydroxyalkyl methacrylate, 2,4-pentadienol-1, an acrylate derivative, and N-vinyl pyrrolidone.

3. The method for preparing the honeycomb-like hydrogel according to claim 1, characterized in that: The mass ratio of the mixed solution, the cross-linking agent and the catalyst is 1500-2500:0.5-1.5:1.5-2.

5.

4. The method for preparing the honeycomb-like hydrogel according to claim 1, characterized in that: The stirring temperature is 20-40°C, the time is 20-40 min, the bubbling time is 5-15 min, the centrifugal speed is 350-550 rpm, the high-temperature cross-linking temperature is 70-90°C, and the high-temperature cross-linking time is 10-30 min.

5. A honeycomb-like hydrogel prepared by the method for preparing the honeycomb-like hydrogel according to any one of claims 1 to 4.

6. A wet gas power generation device, comprising the honeycomb-like hydrogel according to claim 5.

7. The wet gas power generation device according to claim 6, characterized in that: The wet gas power generation device comprises a bottom electrode, a honeycomb-like hydrogel and a top electrode in order from bottom to top. The upper surface of the honeycomb-like hydrogel is bonded and connected to the top electrode, and the lower surface is bonded and connected to the bottom electrode.

8. The wet gas power generation device according to claim 7, characterized in that: The top electrode has a porous structure, and the material of the top electrode includes but is not limited to titanium, copper, gold, silver and platinum, and the material of the bottom electrode includes but is not limited to indium tin oxide, titanium, copper, gold, silver and platinum.

9. The wet gas power generation device according to claim 6, characterized in that: The relative humidity of air suitable for the wet gas power generation device is 20-100%.

10. A method for preparing a wet gas power generation device according to any one of claims 6 to 9, characterized in that: The following steps are involved: A honeycomb-like hydrogel is prepared on the surface of the bottom electrode, and a top electrode is covered on the other side of the honeycomb-like hydrogel, thereby obtaining a honeycomb-like hydrogel wet gas power generation device with high current density output.

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